Information forwarding via sidelink relay
The present application relates to devices and components including apparatus, systems, and methods for information forwarding via sidelink relays in wireless networks.
1 . One or more non-transitory, computer-readable media having instructions that, when executed, cause processing circuitry to:
receive, from a remote user equipment (UE), a message that includes an interest list of one or more system information blocks (SIBs) for which updates are requested, wherein the interest list corresponds to a delta request that includes changes to one or more previous requests;
obtain a SIB of the one or more SIBs from a base station; and
output the SIB for transmission to the remote UE.
2 . The one or more non-transitory, computer-readable media of claim 1 , wherein the interest list is a first interest list and the computer-readable media of claim 1 , wherein the instructions, when executed, further cause the processing circuitry to:
add, to a second interest list of SIBs stored at a relay UE, the one or more SIBs from the first interest list; and
monitor updates to the second list of SIBs.
3 . The one or more non-transitory, computer-readable media of claim 1 , wherein the instructions, when executed, further cause the processing circuitry to:
receive a de-registration message from the remote UE; and
cease forwarding SIBs of the interest list based on the de-registration message.
4 . The one or more non-transitory, computer-readable media of claim 1 , wherein the instructions, when executed, further cause the processing circuitry to:
determine the SIB has been updated; and
output the SIB for transmission to the remote UE based on the determination that the SIB has been updated.
5 . The one or more non-transitory, computer-readable media of claim 4 , wherein the instructions, when executed, further cause the processing circuitry to:
receive, in downlink control information (DCI), a system information (SI) modification indication; and
determine the SIB has been updated based on the SI modification indication.
6 . The one or more non-transitory, computer-readable media of claim 1 , wherein the message is received from the remote UE when the remote UE is in a radio resource control (RRC) idle or inactive mode.
7 . An apparatus comprising:
processing circuitry to:
identify a plurality of system information blocks (SIBs) for which requests have not been previously sent to a relay UE; and
generate a message, to be transmitted to the relay UE, to include a list of the plurality of SIBs for which updates are requested; and
interface circuitry coupled with the processing circuitry to enable communication.
8 . The apparatus of claim 7 , wherein the processing circuitry is further to:
output the message for transmission to the relay UE.
9 . The apparatus of claim 8 , wherein the processing circuitry is to output the message for transmission to the relay UE while in a radio resource control (RRC) idle or inactive state.
10 . The apparatus of claim 7 , wherein the processing circuitry is further to:
generate a de-registration message to be sent to the relay UE to release the request for the SIB.
11 . A method comprising:
receiving, from a remote user equipment (UE), a message that includes an interest list of one or more system information blocks (SIBs) for which updates are requested;
receiving a SIB of the one or more SIBs from a base station;
forwarding the SIB to the remote UE;
receiving a de-registration message from the remote UE; and
ceasing forwarding SIBs of the interest list based on the de-registration message.
12 . The method of claim 11 , wherein the message includes an interest list of one or more SIBs, including the SIB, for which the remote UE requests updates.
13 . The method of claim 12 , wherein the interest list is a first interest list and the method further comprises:
adding, to a second interest list of SIBs stored at a relay UE, the one or more SIBs from the first interest list; and
monitoring updates to the second interest list of SIBs.
14 . The method of claim 13 , wherein the first interest list corresponds to a delta request that includes changes to one or more previous requests.
15 . The method of claim 11 , further comprising:
determining the SIB has been updated; and
transmitting the SIB to the remote UE based on determining that the SIB has been updated.
16 . The method of claim 15 , further comprising:
receiving, in downlink control information (DCI), a system information (SI) modification indication; and
determining the SIB has been updated based on the SI modification indication.